This article brings you the CBSE Class 9 Science notes on chapter 14 ‘Natural Resources’ (Part-II). In the previous part, of this chapter, you learned about Natural Resources and their types.

The CISCE class 9 Environmental Science syllabus 2025-26 focuses on teaching students the basic concepts in Environmental Science, which is an important subject for further classes. The goal of this ...

Vitousek, P. M. et al. Human alteration of the global nitrogen cycle: sources and consequences. Ecological Applications 7, 737–750 (1997).

Scientists at climate talks say major changes to the nitrogen cycle cannot be ignored Date: December 8, 2009 Source: International Geosphere-Biosphere Programme (IGBP) ...

At the beginning of the XXᵉ century, two chemists succeeded in fixing nitrogen in the air. Their invention saw the birth of intensive agriculture, gravely disrupting the nitrogen cycle.

The molecular mechanism of anaerobic ammonium oxidation has been unraveled. The anaerobic oxidation of ammonia (anammox) is an important pathway in the nitrogen cycle that was only discovered in ...

Scientists have long thought most nitrogen in Earth’s ecosystems comes from the air, but new research shows it also is released as rocks weather. This could boost plant growth and help sequester ...